<template>
  <div id="sign-back"></div>
  <RouterView></RouterView>
</template>
<style lang="less" scoped>
#sign-back {
  position: absolute;
  width: 100%;
  height: 100%;
  background: url(/sign_back.png) no-repeat;
  background-position: 200px center;
  background-size: auto 90%;
  @media (max-width: 900px) {
    background-position: center;
    background-size: 100%;
  }
}
</style>
